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4.6

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324 Bewertungen

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59 Bewertungen

We all learn numbers from the childhood. Some of us like to count, others hate it, but any person uses numbers everyday to buy things, pay for services, estimated time and necessary resources. People have been wondering about numbers’ properties for thousands of years. And for thousands of years it was more or less just a game that was only interesting for pure mathematicians. Famous 20th century mathematician G.H. Hardy once said “The Theory of Numbers has always been regarded as one of the most obviously useless branches of Pure Mathematics”. Just 30 years after his death, an algorithm for encryption of secret messages was developed using achievements of number theory. It was called RSA after the names of its authors, and its implementation is probably the most frequently used computer program in the word nowadays. Without it, nobody would be able to make secure payments over the internet, or even log in securely to e-mail and other personal services. In this short course, we will make the whole journey from the foundation to RSA in 4 weeks. By the end, you will be able to apply the basics of the number theory to encrypt and decrypt messages, and to break the code if one applies RSA carelessly. You will even pass a cryptographic quest!
As prerequisites we assume only basic math (e.g., we expect you to know what is a square or how to add fractions), basic programming in python (functions, loops, recursion), common sense and curiosity. Our intended audience are all people that work or plan to work in IT, starting from motivated high school students.
Do you have technical problems? Write to us: coursera@hse.ru...

Nov 22, 2018

I was really impressed especially with the RSA portion of the course. It was really well explained, and the programming exercise was cleverly designed and implemented. Well done.

May 28, 2020

I cant think of any other best way of presenting cryptography to beginners. Everything presented in the course has some connection to cryptography, really enjoyed RSA quest.

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von Jakub D

•Sep 09, 2019

Good introduction

von NIKHIL P

•Sep 16, 2019

very usefull

von DANISH M

•Apr 26, 2020

nice course

von HaotianWang

•Jul 19, 2018

challenging

von Arijit S

•May 15, 2020

It was challenging and interesting. The only issue what I feel is that I am not from a coding background, so to understand the coding concepts were a bit tough. And I asked my queries through forums, but no reply came. But overall, it was an interesting course

von Christopher W

•May 10, 2020

Bravo! Oh man, the "RSA Quest" was the most amazing thing ever! I can't even believe it worked out. And ended with a nod to one of my favorite authors!

This course was one of the most challenging, and at the same time rewarding courses I've done on Coursera. I absolutely love learning from these instructors. Their explanations are so methodical and complete that you really get a good understanding of not only the facts they assert, but the "why" and "how" beneath it. Thank you!

von ABHISHEK S

•May 28, 2020

Highly recommended. Initially, the course seems to be a bit slow-paced but later you will understand that it was all necessary to build the foundation. The material is very good especially the exercises. The last portion teaches you RSA encryption and its prospective attacks. Overall the course was very well structured and intuitive, it made me think and apply the concepts taught.

von Callum T

•Jun 25, 2020

My only critique to this course are the final two quizzes of week 4. The very final quiz relies on you having successfully completed most of the penultimate quiz and is more of a "copy and paste" session. The RSA part (week 4) of this course had not been covered at my University and was very interesting.

von T K

•May 28, 2020

I cant think of any other best way of presenting cryptography to beginners. Everything presented in the course has some connection to cryptography, really enjoyed RSA quest.

von Perumali S

•Jun 14, 2020

Its a good course to the beginers of cryptography.If you want to join you should know basic number theory and computer language python.

von Manikant R

•Jun 12, 2020

Very challenging and exciting to. It was not math it seemed to be like more of puzzle games

von SYED J H

•Jun 21, 2020

probably the best course of this specialization

von Zhen X

•Jun 24, 2020

The last week of this course is very amazing!

von Chandrakala P

•May 03, 2020

Faculty gave good explaination

von Dhruv P

•May 03, 2020

The best!

von Satyam K M

•Jun 01, 2020

good

von Luis M V F

•Jan 11, 2020

In general, this course is much better than the previous 3, and I enjoyed all weeks but Week 4. I think Michael Levin should improve his explanations, and also try to give further examples about the algorithms he is talking about. I would say that it is worthy taking this course, but I really hope Week 4 can be improved.

von Greg L

•Dec 11, 2017

Generally pretty good. Pretty easy level, and the maths is undemanding. Some imprecision in the wording of the tests, and a little too easy on the programming side, but well worthwhile if you still have some holes in your understanding of the principles of RSA encryption.

von Stephen L

•May 11, 2018

The class was interesting but I felt it was difficult and not explained well...to do the modules I had to constantly go back and re-read the slides, re-watch the lectures. There weren't any examples, I feel it would have been helpful in order to grasp the material.

von Md. A K

•May 07, 2020

The instructor tried their best to explain difficult topics like cryptography to make as easy as possible. For this, they really deserve great appreciation. It can be improved if they did not just read out the slides but explain them in some places.

von Aren T

•Nov 20, 2019

Final week is a bit rushed, think it would have benefited from being one week longer.

Nevertheless, an excellent introduction to an extremely difficult and complex subject.

von Stephen S

•Apr 18, 2020

Great introduction to number theory, with little to no assumed knowledge. Proceeds quite quickly, but remains relatively simple and introduces concepts well.

von Gautham A N

•Dec 09, 2018

Amazing course, learnt a lot. The assignments were a bit difficult [ and time consuming ] but they helped me gain a better understanding of the concepts.

von Ivan L F

•Apr 08, 2018

Good material and presentation from the professors. Programming exercises were a bit confusing at times. Overall, short but mathematically solid course.

von Alex Y

•Jan 17, 2019

Sometimes material is very dense. Watching in 1x speed multiple times advisable for some modules later in the course.

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